Big Weapons: Car Engine -- If you completely destroy a car(ex. a bazooka shot), you can grab the car's engine. This only works with Smasher.
Airplane Gun -- On the Air Base stage, go inside the hanger and destroy the plane. After it is destroyed you will be able to use its gun.
Cheat Menu: At the main menu, press Up + B + C-Left + C-Down + Z until a gun shot is heard. Now go to the OPTIONS screen to access the cheat menu.
Show me the money!!!: To get more money in the game roll around the walls. Walk up to the wall and start rolling. Make sure you roll against the wall and not just by it. Money should come out. We know this sounds crazy, but it works.
Special Moves: Each character lists a special move at the end of their character bio. Each of these button configurations work for all charcters giving each chracter 4 special moves.
Weapons at the Start of Stages: When you about to finsh a stage pick up any weapons from the ground and take them with you to the next stage.
Weapons on the First Stage: As soon as you start the level, there is a police car to your left. Destroy it and a weapon will come out the trunk. After that you go through the gate and you should see a black car. Destroy it and another weapon will come out of the trunk.